破坏FKF1同质化增加了晚上FT转录水平,通过增强CO稳定性来提高FT转录水平
Sung Won Cho1,2, Jameela Lokhandwala3, Jun Sang Park4
1Department of Biology, Ajou University, Suwon, Korea.
Plant cell reports
|April 18, 2024
概括
改变FLAVIN-BINDING,KELCH REPEAT,F-BOX 1 (FKF1) 的二元化通过增加CONSTANS (CO) 稳定性来加速Arabidopsis的开花时间. 这种干扰增强了FT表达,微调了植物对光线条件的反应.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 蓝光光受体FKF1 (FLAVIN-BINDING,KELCH REPEAT,F-BOX 1) 对于诱导花位置T (FT) 在长日下表达在Arabidopsis thaliana中至关重要.
- 在下午晚些时候,FKF1通过与FT调节器形成二次体来调节FT,这是主要的花源信号.
- 之前不清楚FKF1同位素破坏影响开花时间的机制.
研究的目的:
- 阐明FKF1同质化在调节FT表达和开花时间中的作用.
- 研究如何破坏FKF1同极体形成会影响CONSTANS (CO) 稳定性和FT诱导.
- 了解涉及FKF1变种,GIGANTEA (GI) 和COP1控制开花的分子相互作用.
主要方法:
- 使用一种已知的FKF1 I160R变体来破坏体外同位素形成.
- 在Arabidopsis thaliana的fkf1突变背景中引入了FKF1 I160R变体.
- 在长日条件下分析了FT表达水平,CO蛋白稳定性和蛋白质-蛋白质相互作用 (FKF1-FKF1,FKF1-GI,CO-COP1).
主要成果:
- 与野生型FKF1.1.相比,FKF1 I160R变种在长时间内显著增加了FT表达.
- FKF1 I160R表现出FKF1同体化减少,但与GI的相互作用增强.
- FKF1 I160R通过促进其与COP1的结合来稳定CO,从而在下午增加了CO的丰度.
结论:
- 对于精确调节FT水平和开花时间而言,FKF1二分化至关重要.
- 减弱FKF1同质化通过增强CO稳定性和FT表达来加速开花.
- 调节FKF1同质化和异质化为植物提供了一个微调FT表达和适应光线线索的机制.
相关概念视频
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